Forming-mold for sewer-conduits.



I s. L. ROMANO. FORMING MOLD FOR SEWER CONDUITS.

APPLICATION FILED JAN-26, I914.

2 SHEETS-SHEET I.

Ml VENTOI? WITNESSES:

s. L.YROMANO.

FORMING MOLD FOR SEWER CONDUITS.

APPLICATION FILED JAN.26, m4.

Lmmm Patented June 22, 1915.

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specification of letters Patent.

Patented June as, leis.

Application filed January 2%, 191%. Serial No, 814,482.

1 To all whom it may concern Be it known that I, SAMUEL L. RoMAno, acitizen of the Dominion of Canada, res ding at Vancouver, in theProvince of Br1t1sh Golumbia, Canada, have invented certain newanduseful Improvements 1n Forming Molds. for Sewer-Conduits, of wh1chthe following is a specification. V

This invention relates to a forming mold for the construction of largesized sewers or the like in concrete.

The primary object of the invention Is to provide mold plates on whichthe concrete may be formed, which mold plates are supported from withinin a manner that they are retractable from the concrete when it is set,and being mounted on a wheeled truck maybe run forward and expandedagain to the required size for the next length to-bev molded on it. y

In an amplification of the idea retracting means is such as to enablethe form to be used for considerable variations of size'and form themold plates being changed in their vation of the form carryingframe asset forth in Fig. 1, the form plates on one side removed to show thesupport. Fig. l is an end elevation of the part of the invention in thefirst stages of its use. Figs. 5 and 6 are detail views of portions ofthe invention.

In these drawings 2 represents the base or lower segment of a concretesewer of circular cross section, the circular arc of its upper surfacehaving been straked or swept to the required form by means of moldboards or a templet. @n this lower segment 2 track rails 3 are laid onwhich the portable frame, which carries the form plates, may be movedforward as the work requires. This form plate carrying frame 4: is of alength corresponding to the length of each section which may beconvenient and is preferably made of plate metal bent to a substantiallytriangular cross section somewhat as shown.

To the underside of this frame 4 the axles 5 of the carrying wheels 6are secured, one being ad acent to each end of the frame and one in themiddle, and over each pair of wheels attachments 8 and 9 are secured oneach side to the frame 4, to which attachments are connected the formplate sustainmg and adjusting means.

The form plates are preferably made of sheet metal, but may be of woodif found more convenient. They comprise a lower and upper side plate 20and 21 on each side, and four narrow crown plates 22, each havmg a rlb23, 24 and 25 of light channel or rail section opposite to eachconnection to the carrying frame. The ribs 23 and 24: are pin-connectedtogether at 26 the hinge pin being removable.

The side plates 20 and 21 are adjustably .connected to the attachments 8and 9 of the frame 4 in the following manner: On each promotingattachment 8 and 9, which extend relatively horizontally outward andangular-1y upward from the frame 4, are welded or otherwise securedtubular supports 10 and 11. These extend toward the lower edge of thelower side plates 20 in the case of the former, and toward the middle ofthe upper side plates 21. To the ribs 23 and 24 of these side plates arepin-connected at 16 and 17, the ends of screws 12 and 13, the other endsof which screws pass into and are adjustable in the tubes 10 and 11 bymeans of a cross handled nut 14' or 15 threaded on each screw andbearing on the end of each tube. The narrow crown plates 22 aresupported from the upper edges of the side plates 21 on each side, theedges of the plates being half-lapped, and the ribs 25 having members 27secured in their channels which members project beyond the width of theplate, as shown in Fig. 5 of the drawing, to enter into the channels ofthe ribs of the adjacent plate.

With this construction of form plate support, the lower or base segment2 of the sewer having been poured and the concrete set the track rails 3are laid upon it, and the carrying frame 4 with the upper side formplates removed and the lower side plates retracted, is run into positionon it. The lower side plates are by means of the nuts screwed out totheir desired extension, as shown in Fig. 4:, and struts 30 areintroduced between the upper edge of the lower side plates 20 and apin-connecting lug on livery of concrete to the workers, and theconcrete may be tamped from within the side plates as delivere When theconcrete has been poured to the approximate level of the upper edge ofthe lower side plates 20 the struts 31 are removed and the nuts arerotated to advance the screws 13 toward the upper limit of theirmovement. The upper side plates 21 are then pin-connected at 26 to thelower plate 20 and to the heads of these screws 13, and after extensionto their required position, a cross strut 32 is introduced between theupper ends of these screws 13. On the struts 32 a light track may becarried to convey the concrete forward to the workers. The concrete isthen poured and tamped around the upper side form plates 21, and

the crown plates 22 are introduced to sus,

tain the concrete for the crowning section of the-sewer. After theconcrete is .set, the tracks and cross struts 30, 31 and 32 and crownplates 22 are removed, the side plates 20 and 21 are retracted by meansof the nuts 14, and 15, and the entire frame is moved forward for thenext length 'of the sewer conduit.

lVhere a conduit of substantially ovoid form is required, the same canbe formed by removing the crown plates 22 and bringing the upper edgesof the upper side plates 21 together, as shown in Fig. 2.

The same manner of supporting and retracting the form plates can be usedfor form plates bent to different shapes to construct a conduit of anydesired form of cross section or size.

Provision for carrying the concrete within the form frame to the workwill not be required unless the same is being conducted in a tunnel.

Where the conduit is being made in an open cut it will be moreconveniently delivered from above.

A simple and convenient device is thus provided by which such work as ithas been designed for can be more economically and quickly conducted.

It will be observed that the ends of the screws 12-13 are susceptible ofadjustment by having their pivotal connections 1617 respectively changedto any one of a series of pin holes, as shown in Figs. 1 and 2 of thedrawings.

Having now particularly described my invention, 'I hereby declare thatwhat I claim as new and desire to be protected in by Letters Patent, is:

1. A form supporting frame for conduit construction in concrete,comprising the combination with a wheeled truck of screw jacks immovablysecured to the truck, said jacks pin-connected to the lower edges oflower'side form plates and to approximately the mid-width of upper sideformplates, and means for removably connecting together the edges ofsaid lower and .upper side plates.

2. A form supporting frame for conduit construction in concrete,comprising the combination with a wheeled truck of tubes immovablysecured to and projecting laterally outward horizontally and angularlyupward from the truck on each side, a screw endwise movable within eachtube, said screws connected at the outer ends to the form plates, and anut threaded on each screw and bearing on the ends of its tubularsupport.

. 3. A form supporting frame. for conduit construction in concrete,comprising the combination with a wheeled truck of tubular supportsrigidly secured to the truck and projecting laterally outwardhorizontally and angularly upward on each side from the truck, a screwendwise movable in each tubular support, said screws connected to lowerand upper side form plates the adjacent edges of which are hinge c)nnected together, a nut threaded on each screw and bearing on the endof its tubular support, and narrow crown plates supported on the upperedges of the upper side plates.

4. In an'apparatus of the character stated, a wheeled truck including atruck frame, two sets of screw jacks, each having one of their endsrigidly secured to the truck frame,

one set of jacks extending in a horizontal plane from each side of thetruck frame, the other set of jacks extending upwardly and diverginglyfromeach side of the truck frallpe, and form plates supported by said acs.

1 5. In an apparatus of the character stated, a wheeled truck includinga truck frame two sets of screw jacks, each having one of their endsrigidly secured to the truck frame, one set of jacks extending in ahorizontal plane from each side of the truck frame, the other set ofjacks extending upwardly and divergingly from each side of the truckframe, form plates supported by said jacks, said form plates including apair of lower plate sections, to the lower edges of which otally upper awheeled truck including a truck frame, two sets of screw jacks, eachhaving one of their ends rigidly secured to the truck frame, one set ofjacks extending in a horizontal plane from each side of the truck frame,the other set of jacks extending upwardly and dirergingly from each sideof the truck frame, form plates supported by said jacks, said formplates including a pair oi lower plate sections, to the lower edges ofwhich the horizontal jaclrs are connected, a pair of upper form plates,means connecting the adjacent edges of said upper form plates togetherat the top of the form, means pivconnecting the lower edges of said formplates to the upper edges of said lower form plates, said upwardlyprojecting jacks being secured to said upper form plates at locationsapproximately midway between the upper and lower edges of the same, andcross struts connecting the upper ends of said upwardly extended jacks.

i. In an apparatus of the character stated, a wheeled truck including atruck frame, two sets of screw jacks, each having one of their endsrigidly secured to the truck frame, one set of jacks extending in ahorizontal plane from each side of the truck frame, the other set ofjacks extending upwardly and divergingly from each side of the truckframe, form plates supported by said jacks, said form plates including apair of lower plate sections, to the lower edges of which the horizontaljacks are connected, a pair of upper form plates, means connectin theadjacent edges of said up or form p ates together at the top of the orm,means pivotally connecting the lower edges of said upper form plates tothe upper edges of said lower form plates, said upwardly projecting andan abutment nut, said screws adapted to project into the respectivetubes and said nuts adapted to abut the same, means for rigidly securingsaid tubes to the trust: frame in two sets, one set of tubes extendingin a horizontal plane to each side of the truck frame, and the other setextending upwardly and divergingly from each side of the truck frame,two sets of form plates; one set 'of form plates comprising a lower formsection to the lower extremities of which the horizontal jack screws arepivotally connected, the other set of form plates comprising a pair ofplates secured together at their upper ends and having their lowerextremities pivotally secured to the upper extremities of said lowerform plates, the jack screws of said upwardly projecting jacks beingpivotally secured to said upper form plates substantially as shown anddescribed.

In testimony whereof I ailixmy signature in presence of two witnesses.

SAMUEL L. ROMANO. Witnesses:

ROWLAND BRITTAIN, MAY VVHYTE.

